LT3757 LINER [Linear Technology], LT3757 Datasheet - Page 3

• Manufacturer Part Number: LT3757
• Description: Boost, Flyback, SEPIC and Inverting Controller
• Manufacturer: LINER [Linear Technology]

elecTrical characTerisTics
erature range, otherwise specifications are at T
PARAMETER
V
V
V
V
SENSE Current Limit Threshold
SENSE Input Bias Current
Error Amplifier
FBX Regulation Voltage (V
FBX Overvoltage Lockout
FBX Pin Input Current
Transconductance g
VC Output Impedance
V
VC Current Mode Gain (∆V
VC Source Current
VC Sink Current
Oscillator
Switching Frequency
RT Voltage
Minimum Off-Time
Minimum On-Time
SYNC Input Low
SYNC Input High
SS Pull-Up Current
Low Dropout Regulator
INTV
INTV
INTV
INTV
INTV
INTV
Dropout Voltage (V
IN
IN
IN
IN
FBX
Operating Range
Shutdown I
Operating I
Operating I
Line Regulation [∆V
CC
CC
CC
CC
CC
CC
Regulation Voltage
Undervoltage Lockout Threshold
Overvoltage Lockout Threshold
Current Limit
Load Regulation (∆V
Line Regulation ∆V
Q
Q
Q
with Internal LDO Disabled
IN
m
– V
(∆I
FBX
INTVCC
VC
FBX(REG)
VC
INTVCC
/∆V
INTVCC
/(∆V
/∆V
FBX
)
SENSE
IN
/(V
)
)
• V
/ V
INTVCC
INTVCC
)
FBX(REG)
• ∆V
)
)]
IN
)
A
CONDITIONS
SHDN/UVLO = 0V
SHDN/UVLO = 1.15V
V
V
Current Out of Pin
V
V
V
V
V
V
(Note 3)
(Note 3)
V
V
V
V
V
R
R
R
V
SS = 0V, Current Out of Pin
Falling INTV
UVLO Hysteresis
V
V
0 < I
8V < V
V
C
C
FBX
FBX
FBX
FBX
FBX
FBX
FBX
FBX
FBX
FBX
FBX
T
T
T
FBX
IN
IN
IN
= 25°C. V
= 0.3V, R
= 0.3V, R
= 41.2k to GND, V
= 140k to GND, V
= 10.5k to GND, V
= 40V
= 15V
= 6V, I
> 0V (Note 3)
< 0V (Note 3)
> 0V (Note 4)
< 0V (Note 4)
= 1.6V (Note 3)
= –0.8V (Note 3)
> 0V, 2.9V < V
< 0V, 2.9V < V
= 0V, V
= 1.7V
= –0.85V
= 1.6V
INTVCC
IN
< 40V
INTVCC
< 20mA, V
T
T
CC
C
IN
The
= 41.2k
= 41.2k, INTV
= 1.5V
= 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted.
= 20mA
l
IN
IN
denotes the specifications which apply over the full operating temp-
FBX
< 40V (Notes 3, 7)
< 40V (Notes 3, 7)
FBX
FBX
IN
= 1.6V
= 8V
= 1.6V
= 1.6V
CC
= 7.5V
l
l
l
l
–0.816
1.569
MIN
–0.9
100
–10
270
2.9
1.5
2.6
16
30
6
7
7
0.0025
–0.80
0.002
0.008
1000
17.5
–0.5
TYP
280
110
–65
230
–15
300
100
220
220
–10
400
0.1
1.6
1.6
5.5
1.2
7.2
2.7
0.1
11
70
12
11
40
95
8
5
–0.784
LT3757
1.631
0.056
MAX
0.05
0.03
400
120
100
330
2.2
0.4
7.4
2.8
40
10
14
10
55
1
6
UNITS
3757fb

%/V
%/V
%/V
MΩ
V/V
kHz
kHz
kHz
mA
mV
mA
mA
mV
µA
µA
µA
µA
nA
nA
µS
µA
µA
µA
µA
ns
ns
%
%
%
V
V
V
V
V
V
V
V
V
V